Transmitter for a coded electronic security system

Details Transmitter for a coded electronic security system Transmitter for a coded electronic security system

1975-07-31

1977-05-31

Habecker, Thomas D.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340224, 340412, 325 40, 325 64, H04B 104, G08B 1900

Patent

active

040272761

ABSTRACT:
The present invention pertains to a transmitter for a coded electronic security system. The transmitter includes a modulator which automatically keys the radio frequency oscillator of the transmitter "on" and "off" to provide a pulse coded signal unique to the particular transmitter in the system. One or more remotely located receivers, of the type described herein, is adapted to receive and decode the signal generated by the transmitter of the present invention and to indicate which of the transmitters in the system has activated a signal device attached to the receiver.

REFERENCES:
patent: 2468703 (1949-04-01), Hammel
patent: 3568154 (1971-03-01), Sills
patent: 3846705 (1974-11-01), Davis
patent: 3876944 (1975-04-01), Mack
Voegli und Kraft, "Implantable Multichannel Temperature Transmitter," Aug., 1973, Mitt Agen, (Switzerland), No. 15, pp. 25-28.

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